Longman Dictionary of Contemporary English
Wiktionary
n. A necktie designated as (part of a) school uniform
Wikipedia
The school tie and the old school tie are a style of necktie which are British institutions particularly associated with public schools.
Usage examples of "school tie".
He had to wear the dark-blue serge shorts, the white shirt, the unchewed school tie.
What he will have, however, is an old school tie, and preferably a tide of some kind to go with it.
Abandoning past theories may do damage to treasured beliefs and one's nostalgic love of the old school tie,4 but a fact is a fact.
She had cinched-in the waist of the baggy overalls issued to us with an old school tie, accentuating her slender waist.
A dark-grey cotton poplin raincoat, calfskin oxford shoes, tweedy jacket, and a striped English old school tie that had been invented by an American designer.
Frank was wearing a dark-grey three-piece suit, a starched white shirt and a tightly knotted Eton school tie.
Denis, he reckoned, with his brilliant smile and public school tie, would be able to handle them better than he could.
Annapolis, old school tie - ring, whatever matters to you Canoe U.
Her school tie was knotted about her neck, knotted again to one of the hooks in the beam from which lamps had hung.
Grenville wore a coloured blazer, the stripes faded like those of an old canvas canopy, a stiff collar and a food-stained old school tie, clumsy grey flannels and open-toed sandals.